基于消息的嵌入式多任务软件开发框架研究

发布时间：2018-04-13 10:48

本文选题：嵌入式操作系统 + 框架　；参考：《浙江理工大学》2017年硕士论文

【摘要】：随着32位嵌入式微处理器的广泛使用,嵌入式系统已经应用于各个领域。传统的流水线式嵌入式软件开发已开始逐步被基于嵌入式操作系统的开发方式取代。嵌入式操作系统继承自通用操作系统,保留其基本特性,包括线程同步、资源互斥访问等。然而嵌入式系统资源相对有限、功能需求更为复杂多变,因而使得基于嵌入式操作系统的开发较通用PC系统更加复杂困难。本文结合嵌入式软件系统的自身特点,充分研究分析嵌入式操作系统的优缺点,提出了一种支持多任务以及消息通信的嵌入式软件开发框架,以功能模块为设计原型,建立消息通信模型,完成功能模块之间的通信,同时建立中断处理模型,完成对于硬件中断资源的统一管理。该开发框架充分吸收嵌入式操作系统的优点,更好地适应嵌入式软件开发特性。具体研究内容如下:1.结合嵌入式软件系统特点,根据RTC(Run To Complete)思想,提出非抢占式双队列调度模型。既可以保证每个独立任务可以及时获取CPU资源,又能够降低调度算法的复杂性,同时还能够规避因抢占式内核造成开发过程中死锁等问题。2.结合多任务操作系统中的任务间数据交互以及任务同步机制,建立消息处理模型,提供同步消息处理以及异步消息处理机制,同时能够进行消息广播,完成多任务间数据共享。建立内存管理机制,减少内存动态申请/释放频率,提高内核效率。3.为统一硬件资源管理,建立中断处理模型,将所有中断信号转换成框架内核信号,使得中断与任务绑定。可以允许用户根据中断处理的时效性进行消息处理方式的选择,同时能够使得一个中断被多个任务共同使用,充分利用中断资源。
[Abstract]:With the wide use of 32-bit embedded microprocessors, embedded systems have been applied in various fields.The traditional pipeline embedded software development has been gradually replaced by the embedded operating system.The embedded operating system inherits from the general operating system and retains its basic characteristics, including thread synchronization, resource mutex access and so on.However, the resources of embedded system are relatively limited, and the functional requirements are more complex and changeable, which makes the development of embedded operating system more complex and difficult than that of general PC system.The message communication model is established to complete the communication between the function modules and the interrupt processing model to complete the unified management of the hardware interrupt resources.The development framework fully absorbs the advantages of embedded operating system and adapts to embedded software development better.The specific contents of the study are as follows: 1.According to the characteristics of embedded software system and the idea of RTC(Run to complete, a non-preemptive dual-queue scheduling model is proposed.It can not only guarantee that each independent task can obtain CPU resources in time, but also reduce the complexity of scheduling algorithm. At the same time, it can avoid the deadlock caused by preemptive kernel.Based on the data interaction and task synchronization mechanism in multitask operating system, a message processing model is established, which provides synchronous message processing and asynchronous message processing mechanisms. At the same time, it can broadcast messages and share data among multiple tasks.Establish memory management mechanism, reduce memory dynamic request / release frequency, improve kernel efficiency. 3.In order to unify hardware resource management, an interrupt processing model is established, and all interrupt signals are converted into frame kernel signals, which binds interrupt to task.It allows the user to choose the message processing mode according to the timeliness of interrupt processing. At the same time, it can make a single interrupt be used by multiple tasks and make full use of interrupt resources.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.52

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